h1{
    color: aqua;
    font-size: 70px;
    text-align: center;
}
.nav{
    height: 50;
    widows: 100%;
    background: salmon;
}
.nav li{
    height: 100%;
    width: calc(100%/5);
    float: left;
    text-align: center;
    line-height: 50px;
    list-style: none;
    font-size: 15px;
}
.nav li:hover{
    background: cornflowerblue;
    color: pink;
    font-size: 20px;
}
.subMenu{
    height: 200px;
    width: 100%;
    background: lightblue;
    display: none;
}
.nav li:hover  .subMenu{
    display: block;
}